3 . One alternative to a regression beta is to use a sector-average beta or bottom- up beta . In computing this sector - average beta , you have to come up with a list of comparable firms . Assume* that you are trying to compute the beta for an Argentine steel company . Which of the following is likely to yield the best estimate ? a . A simple average of betas of 1 Argentine steel companies b . A simple average of betas of 12 Latin American steel companies C . A simple average of betas of 85 emerging market steel companies d. A market - cap weighted average of betas of 4 Argentine steel companies 8 . A market - cap weighted average of betas of 12 Latin American steel companies I . A market - cap weighted average of betas of 85 emerging market steel companies