Question

What events transpired during the reign of Justinian I? (Select all that apply.) {1}The Byzantine Empire conquered lands in North Africa and some of the old Western Roman Empire.
{2}The Byzantine Empire’s growth resulted in it being nearly twice as large as the original Roman Empire.
{3}The Byzantine Empire began to spread too far and the economy suffered, leading to financial ruin.
{4}The Byzantine Empire conquered lands in Mongol China and some of the old Eastern Persian Empire.

Answer 1

Among the choices given,  (1) and (3) are correct. It is true that the reconquest and building programs emptied the treasury, which in effect weakened the Empire. The Byzantine Empire was also indeed able to conquer parts of North Africa and reconquer terrorities of the old Western Roman Empire. He never conquered Mongolia, China and territories in the old Eastern Persian Empire, however, nor did the enlargement of the empire reach twice its original size.

Answer 2

Answer is: 1)The Byzantine Empire conquered lands in North Africa and some of the old Western Roman Empire and 3) The Byzantine Empire began to spread too far and the economy suffered, leading to financial ruin. 
Emperor Justinian reconquered many former territories of the Western Roman Empire, including Italy, Dalmatia, Africa and southern Hispania.