In an Experiment Group a Is Asked to Read a Passage

In an experiment Group A is asked to read a passage. Group B is asked to read the same passage but is given a prologue that helped their understanding of the passage. When given a recall test:

A) Group A recalled less of the passage and made more intrusion errors than Group B
B) Group B recalled more of the passage but made more intrusion errors than Group A
C) Group A could not recall any of the passage as they did not understand its context
D) Group A recalled less of the passage but made the same number of intrusion errors as Group B