What did the plantation owners had to face?

Unsanitary conditions, inadequate nutrition and unrelenting hard labor made slaves highly susceptible to disease. Illnesses were generally not treated adequately, and slaves were often forced to work even when sick. The rice plantations were the most deadly.

Plantation slaves lived in small shacks with a dirt floor and little or no furniture. Life on large plantations with a cruel overseer was oftentimes the worst. ... Slaves who worked inside the plantation homes often had better living and working conditions than slaves who worked in the fields.

Weekly food rations -- usually corn meal, lard, some meat, molasses, peas, greens, and flour -- were distributed every Saturday. Vegetable patches or gardens, if permitted by the owner, supplied fresh produce to add to the rations. Morning meals were prepared and consumed at daybreak in the slaves' cabins.

the correct answer is

d) rocket launcher