Which Action is Unable to Produce Variation

Question

Which action is unable to produce variation?  
A) Crossing over
B) Random alignment of chromosomes during meiosis
C) Asexual reproduction
D) Genetic recombination of alleles
E) Sexual reproduction

Accepted Answer

Asexual reproduction does not involve the fusion of gametes and involves a single individual producing offspring that are genetically identical to the parent. Therefore, it does not produce genetic variation.