Please help me explain this question. Thank you!

1. Women nowadays have more advantages than those in the past. For example, our great grandmothers were not allowed to go to school or to work to earn their own living. _________(1), they had to depend on their husbands financially.

A. Therefore

B. As a result

I don't understand the difference between " As a result" and " Therefore" in this sentence. Please explain this to me, thank you!