Find a mistake exercise

Hello Englishforum Experts,

Could you help with this task, please?
It was a set of exercises, however, this one seems to be the most complicated.

I'd appreciate your expertise.

Confused student

In each sentence there are four underlined words or phrases (marked A, B, C and D). One of the elements in each sentence is ìncorrect. Identify that element.

It may be [A] the business of lawyers to establish causalitv, yet they are [C] divided on why more and more students are [D] opting at careers in their profession.

“I can't claim I [A] set pulses jumping at a party when I announce I am a solicitor”, says one [C] trust lawyer in [D] a central London firm.

Rodney Austin, dean of University College London [A] with responsibility for admissions to the law faculty, agrees: “l think it’s fair to say that the tedium of much of [C] work of a lawyer escapes aspiring [D] legal students.

Some say it is [A] because of the money .they can expect to make, others say the burgeoning popularity of law degrees is related to the size of student loans, while many believe [C] the raise merely reflects the death of [D] youthful idealism.

[A] However the causes, the better universities, overwhelmed by eager law applicants bearing the promises of [C] straight-A grades in devalued A-levels, last year [D] introduced a new written test to identify the best candidates.

Meanwhile, teenagers - [A] egged on by parents panicking on the prospect of top-up fees and impoverished late middle-age - [C] are forsaking Gibbon and Aristotle and [D] getting down to a life of digesting E.U. directives and competition policy.

Any [A] self-respecting English or history undergraduate of the 1970s or ‘80s understood that law students are tragic and marginalized - too uncool to [C] dabble in theatre or drink too much, too busy even to be [D] hearty rowers or rugby players.

In our more [A] driving society, it is the lawyers and medics who feel sorry for the loafers in the English and sociology departments, those sad souls who will graduate with nothing [C] more tangible than [D] thousands of pounds of debt.

Mr Austin of UCL, who helped [A] draw up the new English aptitude test, reluctantly points to the Grisham effect: “ We've had years of LA Law and Ally McBeal; the law is now so [C] much more part of our culture, it [D] had become somehow a sexy profession.

Hard [A] economics also drives the popularity of law: more people are going to university and there is a clear [C] shift towards vocational degrees – such as law and medicine – as students fret out [D] mounted debts.