Answer:
(E) Inflated to make
Explanation:
Option E is correct as it is grammatically correct, makes the text fluent and easy to read, and also indicating a cause and effect situation.
Option A is incorrect because it does not use parallel text structure.
Option B uses unnecessary extra words. Moreover, the phrase "so that it could make" implies that the sole purpose of inflating was to terrify the passengers (which is not the case).
Option C is incorrect. It, although uses parallel structure, but it has less stress on the cause and effect situation (inflating causes terrifying).
Option D is incorrect not only on grammatical basis (incorrect use of "make") but also for the same reason as option C.