The correct answer is (A) Gap; opening; break or interruption, especially in a series or the continuity of a work. Also, a pause between adjacent vowels in a word in order that both are pronounced.

Hiatus comes from Latin hiare (to yawn, gape), hiatus.

Examples of use:

• Spring Break was a one-week hiatus in the second semester schedule.
• His sabbatical year was a one-year hiatus in his professorial career.