Answer:
A PARTNERSHIP FIRM WITH BOTH C CORPORATION MAY NOT USE CASH METHOD OF ACCOUNTING, BUT THERE IS AN EXCEPTION TO THIS RULE THAT IF GROSS RECEIPTS ARE BELOW $5 MILLION.
SO HERE IN THE ABOVE BROWNE AND RED CASE THEY MAY USE CASH OR ACCURAL METHOD FOR 2014, 2015, 2016, ALTHOUGH THE GROSS RECEIPTS OF 2016 EXCEEDING $5 MILLION LIMIT THE AVERAGE GROSS RECEIPT OF LAST THREE YEAR IS STILL BELOW $5 MILLION.
BUT IN YEAR 2017 THEY HACE TO CHANGE THE ACCOUNTING METHOD TO ACCURAL METHOD.