we have raised money for people in need .... 2015 A. in B.at C. since D. for

`=>` $\text{C - since}$

`-` $\text{since + mốc thời gian.}$

`@` vd: since `2020`, since Tuesday, since January, since 5 o'clock.

`-` $\text{for + khoảng thời gian.}$

`@` vd: for `3` years, for `4` weeks, for a long time, for ages.

`=>` Năm `2015` là một mốc thời gian `->` dùng since.

_____________

$\text{@Bulletproof Boy Scout}$

$#Rosé$