Sue: Please help me.
The two ways of relating what a person has said are 1)direct and 2)indirect (reported speech).In direct speech, the original speaker's exact words are repeated. Direct speech is found in plays and quotations. In indirect/reported speech, the exact meaning is expressed but not necessarily using the original speaker's exact words. Pronouns and possessive adjectives usually change from first or second person to the third person except when the speaker is reporting his own words. Sometimes a noun can be inserted to avoid doubt.
Option D is correct as the use of please by Sue shows that he is requesting Sam , so, the introductory verb 'request' 'is used, 'me' changed to 'her' , to which is used to join the two statements, and the introductory verb of the second statement 'replied' is used as Sam replies to Sue, and Sam's reply 'Ok' tells us that he is ready to help. Therefore, 'positively' is used.
Options A,B, and C are wrong as said , and , and OK cannot be used respectively.
The correct answer is D)Sue requested Sam to help her to which Sam replied positively.