Which two digits and signs can be interchanged so as to balance the given equation?25 - 9 + 42 ÷ 6 × 7 = 15

• A. 5 and 7; - and ÷
• B. 9 and 6; + and ×
• C. 4 and 6; + and ÷
• D. 2 and 5; ÷ and ×