The costs relevant to honest expression of male sexually selected ornaments refer a. metabolic or energetic resources that a male must allocate to the growth of ornaments. b. the inability of males to invest in ornament production because he must also invest in weapons for competition with other males. c.the risk a male faces because his ornaments may be too elaborate and females may prefer plainer males. d. the fact that time spent displaying to females is time that a male cannot be competing with other males. e. all of the above.