An example of a product-oriented investigation is one that ...

[cool]

An example of a product-oriented investigation is one that highlights the
 
  A. degree of extension around the hip joint when preparing to kick a ball
  B. role of vision in performing a kick
  C. velocity that a ball can be projected by kicking
  D. effect of a child's estimate of self-worth and its effect on kicking

Question 2

According to Robertson's work with stage development, for stages to exist
 
  A. each stage must be unique from all others
  B. the order of stages must be invariant
  C. the stages must be universal
  D. all of the above

[Chou]

Answer to Question 1

C

Answer to Question 2

D

[cool]

Thanks for the timely response, appreciate it

[marict]

Great answer, keep it coming