UN peacekeeping forces were ineffective in which country in 1994?

Opponents of electronic voting, fearing that every vote on a single machine may be lost to computer error or malfunction, urge the use of ballots that leave a so-called __________ trail

Fill in the blank with the right word.

Researchers commonly safeguard confidentiality by

A) changing the names of participants. B) using participants that live far away from the research center. C) using numerical codes for participant identification. D) using initials only.