A beaker filled with hot water in a room cools from $$70^\circ C$$ to $$65^\circ C$$ in $$t_1$$ minutes, $$65^\circ C$$ to $$60^\circ C$$ in $$t_2$$ minutes and from $$60^\circ C$$ to $$55^\circ C$$ in $$t_3$$ minutes. Then,

A

$$t_1 > t_2 > t_3$$

B

$$t_1 = t_2 = t_3$$

C

$$t_1 < t_2 < t_3$$

D

cannot be concluded