Nthe event of a fire, what is the best way to determine if a door is safe to open? a. avoid touching it except to kick it open b. check it for heat with your forearm c. check it for heat with the back of your hand d. check it for heat by grabbing the doorknob

Consider two similar industries, portal crane manufacturing (pcm) and forklift manufacturing (flm). the pcm industry has exactly three incumbents with annual sales of $800 million, $200 million and $100 million, respectively. the flm industry has also exactly three incumbents, with annual sales of $500 million, $450 million and $400 million, respectively. which industry is more likely to experience a higher level of rivalry?