帮忙做个英语题目

看看这个就明白了
despite
preposition
used to show that sth happened or is true in spite of sth: Her voice was shaking despite all her efforts to control it. ◆ Despite applying for hundreds of jobs, he is still out of work. ◆ She was good at physics despite the fact that she found it boring.
(despite yourself) used to show that sb did not intend to do the thing mentioned: He had to laugh despite himself.
in spite of ＝despite
regardless of
preposition
paying no attention to sth/sb; treating sth/sb as not being important: The club welcomes all new members regardless of age. ◆ He went ahead and did it, regardless of the consequences. ◆ The amount will be paid to everyone regardless of whether they have children or not.
只有regardless of 是自己主观不理会而前两者是尽管的意思表转折

不一样
despite in spite of 偏重于尽管的意思
regardless of 偏重于不管，不顾的意思

AB都表示尽管的意思。He came to the meeting despite his illness而句子里是说打电话不顾周围的环境。

AB表示虽然，尽管的意思。
C有不顾，无视