A – Correct
The average length of a surgery session increased by 25 minutes. Since this is the highest increase, A must be the answer.
B – Wrong
Length of a consultation in 1995 = 9:59 minutes
Length of a consultation in 2000 = 10:00 minutes
1 second extra per consultation will not contribute most to the rise. So B is not the answer.
C – Wrong
Average time spent on a home visit increased by 4 mins from 1995 to 2000.
D – Wrong
The average length of a home visit is irrelevant because we already have the time spent on home visits per week.