Q. Suppose, you got a situation where you find that your linear regression model is under fitting the data. In such situation which of the following options would you consider?1. I will add more variables2. I will start introducing polynomial degree variables3. I will remove some variables

• (A) 1 and 2
• (B) 2 and 3
• (C) 1 and 3
• (D) 1, 2 and 3