A marker buoy off the coast of Gulfport, Mississippi, bobs up and down with the waves. The distance

A marker buoy off the coast of Gulfport, Mississippi, bobs up and down with the waves. The distance between the highest and lowest point is 6 feet. The buoy moves from its highest point to its lowest point and back to its highest point every 8 seconds. Which of the following graphs represents the motion of the buoy if it is at equilibrium when t = 0 and it is moving up from the normal water level.

A.
B.
6-
5
4-
6-
5
3
4-1
3-1
2-1
2
1
0
0 1 2 3 4 5 6 7 8 9 10 11 1
– 1/0 1 2 3 4 5 6 7 8 9 10 11
-2-
-3-1
-4-
-5
2-
-3-
-4-
-5-
-6-
c.
D.
6-
5-
4-
3-
6-
5-
4-
3
2
1-
0
0 1 2 3
101 2 3
5 6 7
B 9 10 11 1
5
7 18
9 10 11 1
2-
-3-
-4-
-5-
-5-
-6-