One of the Steps to Follow to Develop an Investment

One of the steps to follow to develop an investment fund which has been structured to adhere to Shari'ah principles whilst at the same time making use of forfaiting assets was

A) the fund sponsors had to be careful in ensuring that the pool of non-Islamic forfaiting assets was not used to directly satisfy the Islamically compliant obligations under the commodity and trade financing arrangements.
B) screening is required to ensure that the products underlying the LCs do not run counter to Shari'ah principles.
C) there had to be a signoff by Islamic scholars to verify that Shari'ah strictures had been met with.
D) all of the above