Failing in their first attempt at interference with work on the temple, the enemies of god's people continued their opposition by all of the following except:
direct interference with the work
false accusations through "counselors"
personal appearances before the king
letters containing false charges

Failing in their first attempt at interference with work on the Temple, the enemies of God's people continued their opposition by all of the following except: PERSONAL APPEARANCES BEFORE THE KING. 

This is the text I read online:

" Since the Samaritans could not interfere with the work of God’s people by intermingling with them, they sought other means of opposing their good work (Ezra 4:4–22): by direct interference with the work, by falsely accusing them through “counselors” before Cyrus, and by letters also containing false charges. They continued their efforts to frustrate the work of Israel in rebuilding the Temple from the days of Cyrus through the reign of Ahasuerus. Finally, they succeeded in persuading Artaxerxes to stop the work on the Temple (Ezra 4:23–24)." 

Ithink the answer is b. shakeri hope im not wrong : )