Experimental evidence suggests that the brain damage commonly ...

[laurencescou]

Experimental evidence suggests that the brain damage commonly observed in people who consume a lot of alcohol is caused by
 
  A) the direct toxic effects of alcohol on the brain.
  B) thiamine deficiency.
  C) vitamin B1 deficiency.
  D) all of the above
  E) both A and B

Question 2

Scientists in many fields study the unobservable
 
  A) with electron microscopes.
  B) with microelectrodes.
  C) by scientific inference.
  D) by direct observation.
  E) by direct measurement.

[yuyiding]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: C
Rationale: C is by far the best answer because A and C are not used in many fields.

[laurencescou]

Thanks for the timely response, appreciate it

[olderstudent]

Excellent