What characteristics increase the likelihood that a nonnative species will become an invasive species?

The non-native species refers to an introduced species, which is living outside its local distributional range, and has arrived there due to human activity, that is, either accidentally or deliberately. These species can exhibit various influences on the native ecosystem.  

There are certain features, which increase the possibility of a non-native species to become an invasive species, that is, the tendency of a species to tolerate a broad range of conditions, consuming large quantities of food, and breeding briskly.  

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.