I'm 90% sure it's 2000 because urban areas now a days are overcrowed and cities have increased in size from the 1900's and the rest are pretty much both more for the 1900'spam than now but what I think it's more towards 2000's
The answer is C. poor trading products, causing people not to desire the goods others made. If I am wrong please let me know and tell me the correct answer.
Answer: Single gene-pair inheritance occurs when a trait is linked to one gene-pair that consists of two alleles. This is also referred to as Mendelian inheritance. An allele is one part of the gene-pair. One allele is inherited from the father, and one is inherited from the mother.
Explanation: hope this helped