Answer:
The past perfect tense refers to an event that occurred/happened before another event that also occurred in the past.
Example: When they arrived, <u>we </u><u>had </u><u>already</u><u> </u><u>started</u><u> </u><u>eating.</u>
is A
Explanation:
The answer is 4th point
Thomas spotted a chocolate doughnut in the glass case
all the above three are not correct in grammer
The correct answer is D