The haploid number is 60, so that means the diploid number is A-60
B-120
C-30
D- 15

Hence, required answer is 120

Explanation: Haploid number is 60.

Diploid number = 2x haploid = 2 x 60 = 120

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.