The answer to this question is C - the common error in this sentence is a
dangling modifier. The dangling modifier included here, would be the
words 'having risen'. It Is unclear in this sentence whether this phrase
is referring to the hikers, or the river. The hikers could have been
woken up early because of the rains, until we reach the end of the
sentence that concerns a river that also could have risen due to the
rains.
you could split the boys in half by 2 groups of 7 then use one of those seven group and add it to the 21 girls which is 28. Then divide 28 by 7 and you get 4. So there is 5 with 7 members in each. A more easy way of doing it is adding 14 and 21 together and you get 35 and 7x5 is 35. You can also do 7 groups of 5.
I'd say an adjective because it's describing what happened to the roof.
I would say true also because I learned about this before.
