One negative effect of assuming differences is a. we can isolate ourselves from others b. we will experience culture shock c. we will have to learn many new languages d. people will make assumptions about you

The phrase "one negative effect of assuming differences is", is completed by "people will make assumptions about you". When a difference is assumed before a real contact and dialog, it's common to construct some prejudice about other people. Letter d is the answer, once it is a negative effect of assuming differences.

Ithink the answer would be d.