Ann: All the campers at Camp Winnehatchee go to Tri-Cities High School

Bill: That‟s not true. Some Tri-Cities students are campers at Camp Lakemont.

Bill‟s answer can be best explained on the assumption that he has interpreted Ann‟s remark to mean that

(A) most of the campers at Camp Lakemont come from high schools other than TriCities

(B) most Tri-Cities High School students are campers at Camp Winnehatchee

(C) some Tri-Cities High School students have withdrawn from Camp Lakemont

(D) all Tri-Cities High School students have withdrawn from Camp Lakemont

(E) only campers at Camp Winnehatchee are students at Tri-Cities High School

This question requires us to identify the assumption made by Bill.

Ann states that all the campers at Camp Winnehatchee go to Tri-Cities High School.

Bill counters that by stating that some Tri-Cities students are campers at Camp Lakemont.

Bill assumes that when Ann states that all campers go to the school, she means that only those campers are students at Tri Cities High School. This is stated in Option E.

Bill only states that some of the Tri cities students are campers at Lakemont. He does not mention anything about most of the students at Lakemont. Bill’s statement does not give enough information to point to that assumption. So, Option A can be eliminated.

Bill contradicts Ann’s statement by saying that some Tri cities students are campers at Lakemont. So, his statement is not based on the assumption that most of the campers at Winnehatchee are from Tri cities. Option B can be eliminated.

We do not get enough information from the statements to identify whether students first enrolled and then withdrew from the camp. So, Option C can be eliminated.

Option D also mentions that students have withdrawn. Since we do not have enough information to support this assumption, Option D can also be eliminated.

Therefore, E is the most appropriate option.