Is the following a sentence or a fragment?

received your letter this morning.

sentence
fragment

the correct answer is

d) rocket launcher

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.

the quran was sent by an angel to muhhamad   which made up the quran they beiliev that there is on   god who controls everything and they believ every prophet lived jesus and the jews prophet