Hi all - I got this question wrong, but the internet is saying that they are interchangeable. Also, I asked around to a few native-speaker friends, and they could not agree on whether one or the other prevails. Thanks
According to the international investment memorandum recently signed in Geneva, France is one of the 4 European nations planning to provide fewer tax incentives for foreign investment in production of heavy industrial machinery.
planning to provide fewer
planning to provide less
planning on providing fewer
which is planning on providing fewer
that is planning to provide less
I picked C, for that matter.