A,b,c, or d

app.sophia.org Question 18 For this question, use the invoice_line table in the PostgreSQL database for this course. Which of the following statements will change the data type of the unit_price column successfully, without generating an error? LAUNCH DATABASE [4 ALTER TABLE invoice_lLine ALTER COLUMN unit_price TYPE DECIMAL; ALTER TABLE invoice_line ALTER COLUMN unit_price INT; ALTER TABLE invoice_line ALTER COLUMN unit_price TYPE BOOLEAN; ALTER TABLE invoice_line ALTER unit_price TYPE DECIMAL; SAVE CONTINUE Here are all the tutorials from Unit 3. + o