Respuesta :
second its should be it’s, time-trials doesn’t need an apostrophe and i can’t figure out the other 2 sorry
a)cycloclubs should be cycloclub's
b) years' should be years
c) its should be it's
d) trial's should be trials
a) an apostrophe shows that there is an 'is' between the letters.
c) the fact that there's an 'is' has to be known
d) there is no is, so no need for an apostrophe