MULTIPLE CHOICE -Referring to Table 2-5, What Is the Cumulative Relative Frequency

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. TABLE 2- 5
The following are the durations in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l l }\hline&\text { Relative }\\\text {Time (in Minutes) }&\text {Frequency }\\ \hline0 \text { but lessthan } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\\text { 10 but lessthan } 15 & 0.15 \\\text { 15 but less than } 20 & 0.10 \\\text { 20 but lessthan } 25 & 0.07 \\\text { 25 but lessthan } 30 & 0.07 \\30 \text { or more } & 0.02 \\\hline\end{array}\end{array}$$
-Referring to Table 2-5, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?

A) 0.59
B) 0.84
C) 0.76
D) 0.10