_________ is assistance and comfort supplied by a network of caring, interested people

The perceived loudness of a sound is related to the ________ of a sound wave

a. pitch b. amplitude c. spectrum d. timbre

United States' tobacco companies have sought to carve out new markets by turning to ___________, both at home and abroad

a. all groups of people c. the least advantaged groups of people b. the most advantaged groups of people d. women's groups