When I look back over there wartime years I cannot help feeling that time is an inadequate and even capricious measure of their duration at one moment they seem so long, at another so short.

misleading
whimsical
erratic
unpredictable

The correct answer is: C. erratic

The word “erratic” means “not regular or consistent; unpredictable.” This is the best description of how time can seem during wartime. At one moment, the war can seem to drag on forever, and at another moment, it can seem to have passed in the blink of an eye. This is because wartime is a time of great upheaval and change, and it can be difficult to keep track of time when everything is constantly changing.

The other options are not as accurate descriptions of how time can seem during wartime. The word “misleading” means “giving a false or misleading impression.” This is not an accurate description of how time can seem during wartime, because time does not actually change during wartime. The word “whimsical” means “governed by caprice or impulse; unpredictable.” This is not an accurate description of how time can seem during wartime, because time is not actually governed by caprice or impulse. The word “unpredictable” is similar to the word “erratic,” but it is not as specific. The word “unpredictable” can be used to describe anything that is not certain to happen, while the word “erratic” is specifically used to describe something that is not regular or consistent.

In conclusion, the correct answer is: C. erratic