A team estimated 3 months effort to implement an enhancement to order entry application. The data showed that every month due to poor response time of current application, 20% of existing customers are lost. What should be done?

A team estimated 3 months effort to implement an enhancement to order entry application. The data showed that every month due to poor response time of current application, 20% of existing customers are lost. What should be done?
a. Calculate current process capability and analyze further.
b. Quick fix of problem.
c. Take more people to complete project faster.
d. Just wait and watch.