Select the option that expresses the given sentence in reported speech. He said, “I have been working on the project for months”.

Reported speech is the form in which one can convey a message said by oneself or someone else, mostly in the past. It can also be said to be the third person view of what someone has said. In this form of speech, you need not use quotation marks as you are not quoting the exact words spoken by the speaker, but just conveying the message. You can use verbs  like said, asked, requested, ordered, complained, exclaimed, screamed, told, etc. If you are just reporting a  declarative sentence , you can use verbs like told, said, etc. followed by ‘that’ and end the sentence with a  full stop .