" The difference between the two sentences is that in one, there is no comma after "infants," while there is a comma after the other: infants, whose. To understand which is correct with regard for the comma, you would want to omit the comma. You are limiting the group of infants who would be affected by this seating arrangement to those whose head were only inches away from the devices.
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yong kimI wonder if "acknowledging" means "which acknowledged" . and acknowledged, or anything.= while they acknowledged
yong kimI would like to know which is correct.infants, whose