Final answer:
The question regarding the percentage increase in emergency calls during sporting events cannot be answered with the information provided, as it relates to long-distance calls by company employees and unicameral legislature statistics.
Step-by-step explanation:
The question pertains to finding the % increase in emergency call outs during sporting events. However, the information provided does not directly answer the question about emergency calls during sporting events. Instead, the reference material mentions the average number of long-distance phone calls made by employees during peak time and the probability of making more than that average. Additionally, it provides a statistic related to countries with unicameral legislature. Without specific data on the increase in emergency calls during sporting events, none of the answer choices (a. 5%, b. 10%, c. 20%, d. 30%) can be accurately selected. Therefore, we are unable to provide a definitive answer to the original question based on the information given.