An appropriate choice is ...
A. Decides that she will give it some more thought and do some research.
_____
In the real world, the most likely response will be B. The second most-likely response will be to ask the assistant to do the research. Another possible response is to make the counter-suggestion that e-mail, text, or social media reminders be used.
They mostly developed because men did most of the work. Agrarian societies required hard work and toiling out in the field while pastoralism required people to take care of numerous animals at once and these animals often needed human strength and speed. Thanks to this, men were the ones who did those jobs and since they were valued more than taking care of the household, gender inequality originated.