Answer:
D: " a writer's list of favoritite books
Explanation:
"To try to write certain sentences is difficult"
The correct statements are 1, 2 and 3.
1) The sentence is correctly written. The pattern "to try to do something" is correct and can be used.
2) The sentence contains more than one infinitive. It contains two infinitive verbs. TO TRY and TO WRITE.
3) One infinitive is inside another infinitive phrase. "To try to write certain sentences" is an infinitive phrase, it functions as a noun because it is the subject of the sentences. So, the second TO INFINITIVE is inside the main infinitive phrase. (That is the reason why number 4 is not correct)
1, One of the definitions of dissent is to differ in opinion esp from the majority

We will write it
"it would be a good idea if you phone the secretary and ask her as semi formal."
MISTAKE:- There you used asked but there will be ASK as we know that what form of verb we use before AND the same form we use after And. Here you used 1st form before And so after And we will use the first form of verb which is ASK .
Hope it helps you.