Match the letters to the numbers. Please answer below cannot open any links. This is for an exam and i need help. Thank you and please !!!

When your organs don't receive enough blood, they begin to a. shut down b. speed up c. inflame d. dry out

  usually, loads of more than pounds require the assistance of a second person.           a. 40   b. 20   c. 50   d. 30

Ahigh school teacher wants to study the seating habits of students in the cafeteria to determine if students sit in the same seats or change seats from day to day. she sits in the cafeteria for several days, and without interacting with the students, records where they sit each day. what is a potential benefit of this type of research? there is an independent variable. there is a dependent variable. the researcher can gain personal information about an individual. the participants act normally. the information can be gathered over a period of several years.