Both Beth and Roger Are Avid Golfers Who Want to Improve

Both Beth and Roger are avid golfers who want to improve their games. Beth sets a goal of reducing her average score by four shots within the next three months, while Roger decides to set a general goal for himself of "becoming a better golfer" and figures this will be enough to motivate his behaviour. Based on the research conducted on goal-setting techniques, which of the following is most accurate?

A) Roger is more likely to improve than Beth is.
B) Beth is more likely to improve than Roger is.
C) Neither Beth nor Roger is likely to improve at all.
D) Both Beth and Roger are equally likely to improve.