A geometric sequence is given. Find the common ratio and write out the first four terms. 20 10 2 16 O A. (= 5: dj = 5. d2= 5. 03 - 5. 4 - 5 2 2 4 O B. = : 1- . 02- 5 d3- d4 1 2 4 O c. r=2, dj - 5 . d2 - 5. d3 - 5. 4 - 4 8 16 O D. r-2: d1 - 5 . 2 - 5 . 03 - 5 . 04 =