Volcanic , eruptions , breathing , decaying dead matter , burning fossil fuels , and warm bodies of water are all carbon examples of which the following? A:Sources
B:Sinks
C. Reservoirs
D: All the above
Pls answer ASAP

22. the effect of threshold braking is to a. cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Astudy that involves interviews of adults is eligible for expedited review. the researcher wants to add an adolescent population (aged 12 to 17) to the study and has designed a parental permission and assent process. no additional changes are planned. which of the following statements about review of the revised protocol is accurate? the research would only be eligible for expedited review if the adolescents are capable of understanding the same consent forms used for the adult population. the research would only be eligible for expedited review if the adolescents have been declared to be emancipated minors. the new research would need full review by a convened irb because children are a protected population. unless the nature of the questions would raise the level of risk to > minimal for adolescents, the research would still qualify for expedited review.

The federal crescent is shaped like what letter