Pls help I really need to get it right

Bryan has written the following sentence as part of a draft in a narrative passage.
A member of the audience raised their hand during the city council meeting.
Which of the following is a correct revision of Bryan's sentence?
A
A member of the audience raised my hand during the city council meeting.
B
A member of the audience raised its hand during the city council meeting.
C
A member of the audience raised her hand during the city council meeting.
D
A member of the audience raised your hand during the city council meeting.

What impact did improvements in farming technology near the end of the nineteenth century have on the american economy? a. more energy was needed to power equipment, creating the renewable energy industry. b. less labor was necessary on farms, leading workers to pursue other jobs. c. less money was invested in farming as many locally owned farms went bankrupt. d. more demand for agricultural products reduced the price of food and animal products.

Afull irb committee meeting is convened and one agenda item is a new research proposal to evaluate how mothers interact with their learning-disabled child. the inclusion criteria require the children to be a minimum of five years of age. the protocol requires the mother of the child to look at the child without any expression and not to talk to the child for three minutes. the committee determined that the mother's required task may upset the child. the irb approved the study with appropriate language in the parental permission form regarding the possibility that children might become upset. after the start of the study, the principal investigator reports to the irb that, as expected, one of the children became upset. the incident was handled according to the protocol and the child is fine. what should the irb do with regard to this report?

Why do all market economies have taxes to support armed forces police forces public schools and at least some form of public transportation?