How can a scientist ensure that his Studies involving humans or animals are conducted under strict policies and procedures. This solution addresses which limitation? or her data are reliable?

answer; ///i believe that the correct answer is (b); ///the candidate must be a native born american citzen;

explanation:

he always remember humbleness for other

he was first president born poor

eroupe is a great mideval place and alot of wars went on alao

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.