D, I'm pretty sure it's D
Answer:
The answer is D
Explanation:
A seems right, but Sally is the one who's optimistic in the story, not Beth, which means it isn't right.
B is not right because while the story mentions their grandparents, it doesn't directly say that they miss them.
C is not right, the story doesn't mention cookies at all.
D is right, because Beth directly says "I don't remember what Father looks like,"
I hope this helps
Answer: a. testing effect
Explanation:
Testing effect is a type of threat to internal validity of an experiment. Internal validity is assessing whether a factor makes a difference in an experiment or not and if it does, whether there is adequate evidence to support this correlation.
Testing as a threat to internal validity is when a second test is taken on the outcome of a first test. Other internal validity threats are history, maturation, instrument modifications.
