大全165，我查了longman，发现……

1.       Because of the business community’s uncertainty about the President’s position in regard to the issue of the budget deficit, an unanticipated rise in interest rates has occurred.

(A) in regard to the issue of the budget deficit, an unanticipated rise in interest rates has

(B) on the deficit, an unanticipated rise in interest rates has

(C) regarding the budgetary deficit, an unanticipated rise in interest rates have

(D) on the deficit, an unanticipated rise in interest rates have（B）

(E) regarding the deficit, an unanticipated rise in interest rats have

Longman:

the difference between the amount of something that you have and the higher amount that you need
-the country's widening budget deficit

-the US's foreign trade deficit

所以，B中只讲deficit,是不是不能表达budget deficit的概念呢？因为这样一来就不知道到底是什么deficit了啊

Position on是个固定搭配. 见longman:

▶OPINION◀
[countable]an opinion or judgment on a particular subject, especially the official opinion of a government, a political party, or someone in authority

ￚsynonym attitude

position on
What's the party's position on tax reform?

position on确实是固定搭配，

但是！！！但是 position in/with regard to 也到处可见。不信去网上随便查都有！