Which of the following best summarizes the correct process? Select one: O a. Calculate total income, subtract tax credits and deductions, determine refund or balance owing. O b. Calculate total income, subtract deductions, calculate taxable income, apply tax credits, determine refund or balance owing. O c. Calculate total income, deduct RRSP contribution, apply tax credits and deductions, determine refund or balance owing. O d. Add all deductions and subtract the credits from total income, determine refund or balance owing.