Bpp and kaplan practice kit question

I have doubt of the answer provided in the textbook and I don’t understand it, Hope I can get help from here and clarify my question.Thank you very much 🙂

1) internal function that give competitive advantage to the company are outsourced to third parties.
A. Hollow
B. Virtual
C. Modular
Answer is B
Why is B not A?

2) ____system pool data from internal and external sources and make information available to senior managers for unstructured decisions.
Which word or phrase correctly completes the above sentence?
A. Expert
B. Executive information
C. Management information
D. Decision support
Answer is B
But My answer is D, for unstructured decision why it does not use the decision support system?

3) imported inflation occurs in countries which make significant levels of purchases from foreign suppliers and where ___
A. The money supply rises
B. The national currency weakens
C. The national currency strengthens
Answer is B
But my answer is C

4?Mrs Grey likes swimming and playing badminton as part of her exercise routine.She has a budget of up to $25 to spend each week on getting fit.Each trip to the swimming pool costs $3,and each badminton session costs $4
Her marginal utility schedule is given below :
Number of trips Marginal utility of swimming Marginal utility of badminton
1 90 100
2 80 90
3 70 80
4 60 70
5 50 60

Which combination of activities gives Mrs Grey the highest utility?
Swimming Badminton
A 1 5
B 3 4
C 4 3
D 2 4
Answer is B,how to calculate this marginal utility?

5?What is a competence framework mainly used for?
A. To identify present level of competence
B To identify training needs
C To evaluate training success or failure
Answer is A
But my answer is B