Fill in the blank with the most appropriate word.
She asked me, "Can you help us?" She wanted to know if __________.
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. 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.
When we turn direct questions and exclamations into indirect speech, they are converted to affirmative statement .( ? and ! is not used).
Option B is correct as when we convert the given direct question to indirect speech which doesn't start with a question word, then if/whether is used and can and you is changed to could and I respectively.
The other options are wrong as we and can can't be used.
The correct answer is B)I could help them