Final answer:
The student can take the Oregon credit even if they take the Retirement Income credit.
Step-by-step explanation:
In this case, we need to determine if the student can take the Oregon credit and the Retirement Income credit based on the given information. The student has a Credit for the Elderly and Disabled of $370 but can only use $278 due to the tax liability limitation. The Oregon credit is $111, which is less than the $278 available. Therefore, the student can take the Oregon credit even if they take the Retirement Income credit. Hence, the correct answer is Option A: $111 and he can take the Retirement Income credit.