Consider the conjectures shown if two angles are complementary , then both angles must be acute. if two angles are acute, then their sum must be less than 180° which is a viable argument for these conjectures ? ( choose all that apply ) a. given angle1 and angle2 are acute angles , therefore , they are complementary . b. given angle1 and angle2 are acute angles; therefore , their sum is less than 180°. c. given angle1 and angle2 are complementary , therefore , they are both acute angles . d. given angle1 and angle2 are complementary , therefore , their sum is less than 180 ° e. given angle1 and angle2 have a sum less than 180 degrees , therefore , they are complementary . f. given angle1 and angle2 have a sum less than 180 °, therefore , they are both acute angles .