What is the primary purpose of the letter$/$memo of transmittal? a$)$ It provides the essential information that your reader needs in order to understand how the data were collected and how the results were achieved. b$)$ It is the marketing research firm's certification to do the project c$)$ It helps the reader locate information in the research report d$)$ It provides the client firm with a name in the research organization providing the report. e$)$ It serves as a summary for the busy executive or a preview for the in$-$depth reader