Review the passage. many veterans who are not homeless or nonetheless ''precarious.'' among the estimated 21.8 million veterans in this country, more than 1.5 million spend more than half of their income on housing-well above the recommended maximum threshold of 30 percent.

which best explains why this statement is a fact, rather than an opinion?

a. it can be proven through research.

b. the author does not give precise, exact numbers.

c. there are multiple perspectives on this issue.

d. it expresses a belief that may not always be true.

me