13. According to the text, which statistic best identifies the percentage of
America's K-12 student population with at least one parent who is an
unauthorized immigrant?
a. 2%
b.4%
C. 5%
d. 7%

If you mean how the great lakes formed, then  the great lakes began to form at the end of the last glacial period 14,000 years  ago, ice sheets  retreated, which led to exposing the basins they had carved into land which then filled with melt-water.

Answercooperative; cooperative;

Answeremergence;