Performance Standards in the Use of High-Technology Products Will Sometimes

Performance standards in the use of high-technology products will sometimes differ from country to country because:

A) there can be variation in the level of technical infrastructure between nations.
B) consumers will often prefer products that are simple to use.
C) products developed in advanced nations often exceed the needs of users in less-developed countries.
D) all of the above.
E) options B and C only.