You can climb with ease——as 1 have done many a dine —several of its mountains one day.

You can climb with ease——as 1 have done many a dine —several of its mountains one day.
A、You can climb its mountains several times without difficulty in one day——as once a time.
B、You can climb its mountains several times without difficulty in one day——as I have done many times.
C、You can climb its several mountains without difficulty in one day一as I have done many times.
D、You can climb its several mountains without difficulty in one day——as I have done once a time.
正确答案：C