The timid girl was amazed that she had climbed up the rock face after her instructor’s encouragement.
My son’s answer : Much to the timid girl’s amazement, she had climbed up the rock face after her instructor’s encouragement.
Answer sheet : Much to her amazement, the timid girl had climber up the rock face after her instructor’s encouragement.
can anyone tell if my son’s answer is correct/ acceptable for this synthesis and transformation ?