180.    (26977-!-item-!-188;#058&002184)
                                                                               
Noting that the Federal Reserve had raised a key short-term interest rate again last month, analysts said that they expected orders for durable goods  to decline soon because rising interest rates makes it more expensive to buy them on credit
A. rising interest rates makes it more expensive to buy them on credit
B. rising interest rates make buying on credit more expensive
C. a rise in interest rates make it more expensive to buy on credit
D. a rise in interest rates make buying on credit more expensive
E. a rise in interest rates makes it more expensive for them to be bought on credit

ANS: B
                                                                               
請問不選CDE是因為a rise in ...改變句意嗎?
make it more...to V和make Ving more...又該如何判斷
因作題時覺得後者不是很正式的寫法

E:

unclear with 'them'