A) Texting can cause fatal traffic accidents and misunderstandings between friends.
I'd say it's D) Indirect object, but I'm not sure, so don't take my word as gospel :)
Answer:
First of all, words have to types of meaning, denotation and connotation. A connotation, like this case, refers to the ideas or feelings in a word valued by people. So, is the meaning that ''suggest'' the word.
In this case, pioneer are labeled as such by people, involves values and ideas, like referring to someone that initiated a movement or experiment by a first time.