Questions 135~138 refer to the following text.
Middle-aged people who unexpectedly lose their jobs often face challenges infinding new employment __135__ skill gaps. With the rapid pace of technologicalchange, some workers may find that their skills are __136__ in demand or that theyneed to update their knowledge in order to remain competitive. This can beparticularly challenging for those who have been in the same position for many yearsand have not had the opportunity to keep up with new developments in their industry. __137__ , the cost of retraining or further education may be prohibitive for somemiddle-aged workers, especially if they have dependents to support or have notsaved enough for retirement. Employers may also prefer to hire younger workers whohave more recent training and education, __138__ the difficulty for middle-aged jobseekers to compete in the job market.

【題組】135.
(A)result in
(B) due to
(C)because
(D) within reason