How many letters have german alphabeth?

When you use construct a sentence in german in past tense for example i drank milk on monday in the caravan the last tense version ich getrinken milsch am montag in mine whonwagen how would you put this is the write order if the sentence

The most logical sentence to express "the family is having fun in the snow' in german a)die familie amusieren sich im schnee b)die familie amusierst sich im schnee c)die familie will sich im schnee amusieren d)die familie amusiert sich im schnee

How to put presence and circumstances in one sentence