A. You have done extra working.
Try to save time by using the following formula:
Depreciation rate = ¼ x 2 = 50%
Secondly, Your schedule is not properly presented, however calculations are correct.

B. Good, correct answer. However, You are supposed to write the Description ‘Accumulated Depreciation’ instead of Depreciation

C. The entries are correct. However, you are supposed to credit Accumulated Depreciation instead of Asset.

Comments: Good effort but you need to work with smartness and proper presentation.