Very lengthy and tricky question.
Lets break down argument:
The consultant says that cross functional teams reason for innovations are exposure to broader mental models and observing and being observed by cross functional experts, not just the exposure to breadth of tools itself, which can be explained to anyone without giving other exposures of actually working and experiencing real time problem solving among experts
What can strengthen the argument. Identifying no other reason for this superior innovation.
Lets follow process of elimination
A- This can be easily ruled out since it is not even talking about the main conclusion of the argument and no talk of innovation. Just saying interdepartmental communication is beneficial but do it helps in innovation. NO talk about that
B- It is talking about a particular kind of industry follows cross-functional setup but no general reason for its benefits in terms of they are innovative which arguments talks about- ruled out
C- This is even undermining the argument that cross function team has any advantage. This is easy to rule out
D- This is giving a possible explanation why working in cross functional setup is the reason behind reaping those innovative benefits. Even if team formed from single department are briefed about the problem solving models and methods employed in other's function e, they do not become innovative than those single department people who are not briefed at all. That means, without working in cross functional setup, merely being explained ,as we discussed in problem dissection, there is no impact on innovative mindset. It only comes from working in those setups and experiencing them.. Good choice for our answer
E- This is also a good explanation as it says team consisting of members who worked in multiple department earlier are more innovative than team consisting of who worked in single department. confusing
Out of D and E I choose D, because D directly rules out alternative explanation that even briefing theoretically about other departments model can make team innovative and it is the working experience and learning mental models in that setup that makes them innovative While, E just do not overrule this. It strengthens in terms of experience is valuable but other factors also like briefing of other department's function can also me you innovative. This E can't rule out
My Answer-D