Ethnic conflicts, widespread violence, and wars have no effect on the outbreak of disease and the spread of infectious diseases

Why do scientists hold and attend annual or semi-annual professional conferences?

a. to catch up on very recent and/or on-going research b. to meet each other personally, in order to better judge each other's work c. to get away from teaching commitments d. to bypass having to read the literature

The three main types of nonprobability sampling procedures include: convenience, cluster, and snowballing

Indicate whether the statement is true or false