The correct answer is: Only assumption I is implicit.
The statement says that the advertiser is looking for unmarried, presentable, matriculate girls between 18 and 21, able to speak fluently in English to be taken as models. This means that the advertiser believes that fluency in English is a necessary requirement for a model. However, the statement does not say anything about height, so we cannot conclude that height does not matter in performing as a model. Therefore, only assumption I is implicit.
Here is a brief explanation of each option:
- Option A: Only assumption I is implicit. This is the correct answer.
- Option B: Only assumption II is implicit. This is not the correct answer, because the statement does not say anything about height.
- Option C: Either I or II is implicit. This is not the correct answer, because only assumption I is implicit.
- Option D: Neither I nor II is implicit. This is not the correct answer, because assumption I is implicit.
- Option E: Both I and II are implicit. This is not the correct answer, because only assumption I is implicit.