6. The fall in the Agriculture Institute's hostile disease threat level indicate that farmers should maintain a high level of production in the next quarter, but that the introduction of a new disease strain will pose a serious threat if suitable preventative measures are not developed.
a. indicate that farmers should maintain a high level of production in the next quarter, but that
b. indicate that farmers are to maintain a high level of production in the next quarter, but
c. indicates that farmers will continue at a high level of producing in the next quarter, but that
d. indicates that farmers should maintain a high level of production in the next quarter, but that
e. indicates that farmers will maintain a high level of production in the next quarter, but
OA: e