The graph shows the water level in a bathtub, in inches, over time, t, in minutes.


For which values of t (time) is the water level unchanging?


Choose all answers that are correct.




A.

from t = 0 to t = 3


B.

from t = 3 to t = 5


C.

from t = 5 to t = 7


D.

from t = 7 to t = 12


E.

from t = 12 to t = 15