Letter a, "He wants to arrive on time." is a complete sentence because it makes up a full idea, as to when the rest do not.
Explanation:
OA) after the note-taking process
Heya here’s your answer
1) He told me that he could help me
2) They said they would join us for lunch
3) I told you that I was going to be late
4) The article said that the accident happened the day before
5) Our teacher had told us that she had lost our homework
