Who first observed that muscles would respond to electrical stimulation?

Many African American, Latino, and Asian American families have been classified as "authoritarian," but this is inaccurate because ____

a. each of these subcultural groups has its own distinctive form of warmth for their children b. parenting style has no cultural boundaries so an accurate picture cannot be taken c. the parents of these subcultural groups are more likely to be indulgent, having both low responsiveness and low demandingness d. there are too few of these subcultural groups to develop an accurate picture of the parenting styles that these parents possess

Jewish boys take part in bar mitzvah and girls take part in bat mitzvah. These are both examples of ________

Fill in the blanks with correct word