Answer:
popular and dangerous are the answers
1. <span>the search for religious truth - <u>Christian</u>: the quest of a true Christian is to find God, and thus love and truth
2. </span><span>resistance and the inability to adapt to change - <u>Obstinate</u>: obstinate means stubborn, so this is an obvious answer
3. </span><span>humanity’s weak will and lack of resolution - <u>Pliable</u>: pliable means weak, easy to bend to somebody else's will
4. </span><span>God’s ability to guide humans by sending messengers - <u>Evangelist</u>: evangelists are messengers, so this is again an obvious choice</span>
The correct answer is A. reliable.
The writer was 'an authoritative source' because of her degrees, guest appearances, etc. Thus, she was a source you could rely on, she was reliable, given that she had experience to back her ideas up. Therefore A is the only correct answer.
D I believe. Seems to be the only relevant.