Which of these is a compound sentence?
a. roland and el cid are both famous epic heroes of medieval europe.
b. roland appears in a french epic, whereas el cid appears in a spanish one.
c. roland was a knight when charlemagne was emperor.
d. roland's epic is long, but el cid's epic exists only in fragments.

d

Explanation:

because when you read the sentence it flows together and apart whihc is hwat you want from a compaound sentence.

D. is the correct answer

Explanation:

i got it right on my quiz.

one small little fact i am actually descended from El Cid a Spanish Knight or Rodrigo Diaz de Vivar. This is not a joke its for real, but hope i helped. :)

two factors or characteristics of a chapter that might make it difficult to read would be words i don't understand, or if i don't fully understand what's going on in the chapter. strategies i can use to get through the difficult material would be a dictionary, and re-reading previous chapters to get a better grasp of what the author is trying to say.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.