________ files contain very little formatting and do not support formatting such as boldface, italics, or underline

In a probability sample, _____

a. every unit has an equal or known chance of being chosen for study b. every unit studied is chosen by the researcher based on judgment or convenience c. data are selected for use by the researcher based on their relevance d. data cannot be extrapolated due to unknown sampling error

Foreign currency options are available both over-the-counter and on organized exchanges

Indicate whether the statement is true or false.