Considering the available options, the statement that represents a direct causal relationship is that "Sue's desire for higher education made her willing to bear the opportunity cost of going to college."
Opportunity cost is the loss of one choice when another alternative is taken as the choice.
Therefore, given that Sue chose to attend college rather than join the workforce, the direct causal relationship here is that Sue's desire for higher education made her willing to bear the opportunity cost of going to college.
Hence, in this case, it is concluded that the correct answer is option B.
Learn more about Opportunity Cost here: https://brainly.com/question/481029