Which of the following action could Jenny take to get rid of her opportunity cost

The specific department of health and human services (hhs) regulations that apply to research with children are known as: subpart b: additional protections for children involved as subjects in researchsubpart a: the common rulesubpart d: additional protections for children involved as subjects in researchsubpart c: protections for children in research

What greek scientist created a screw to move water for irrigation?

Which of the following events most directly contributed to the establishment of israel as a nation