PLEASE HELP ME. WHICH OPTION IS IT A), B), C) OR D)?

Question 2 (Mandatory) (10 points) Cit2 - sin4t} Determine 4 (a) $2-16 S (b) W / N $2-16 S (c) 2 $ 3 $2+16 (d) 2 4 s 3 $2+16 ( 1) a O 2) b 3 ) c