Using a process of elimination I came to the conclusion that the answer is B. Right?

Alright, I am reading this fairly quickly, so perhaps I am making a dumb mistake... but shouldn't the answer be A?Jennifer is using her ENTIRE vacation time of 4 weeks; this implies that she has 3 weeks from this year, plus one week rolled over from last year. For one week to roll over, she must have had two weeks left remaining at the end of last year.