Although Transposable Elements and Simple Tandem Repeats (STRs)are Both Repetitive

Although transposable elements and simple tandem repeats (STRs) are both repetitive DNAs,they differ in that _____.

A) STRs occur within exons;transposable elements occur within introns
B) STRs occur within introns;transposable elements occur within exons
C) the repeated unit in STRs is clustered one after another;transposable element repeats are scattered throughout the genome
D) the repeated unit in STRs is much larger than the repeated unit of transposable elements
E) variation in STR repeat number comes from STR movement in the genome;variation in transposable element repeat number comes from errors in DNA replication