Alexander graham bell and alexander graham bell’s assistant, thomas watson, worked together on making the world’s first telephone.

which is the best revision using pronouns?

a. best as is.
b. alexander graham bell and his assistant, thomas watson, worked together on making the world’s first telephone.
c. he and his assistant, they worked together on making the world’s first telephone.
d. alexander graham bell and alexander graham bell’s assistant, thomas watson, they worked together on making the world’s first telephone.

one thousand and one nights, also known as arabian nights is a collection of stories whose basic structure is that of embedded narrative. this technique refers to a main story which works as the common frame - or framing narrative - for the other stories, and then this series of stories which are connected to the main one. this technique can also be referred to as a story within a story. the stories stem from the original tale, some begin and end on their own, some are connected to the previous or following one, by means of questions that are answered in the subsequent tale, or characters which reappear.

what are the main ideas?