In 1993, Egyptologists using a mechanized robot discovered a small door in the Great Pyramid that are believed to lead to a series of tunnels under the pyramid: however, the Egyptian government has denied the archaeologists' request to open the door so we may never know what secrets the Great Pyramid still holds.

A. are believed to lead to a series of tunnels under the pyramid; however, the Egyptian government has denied
B. is believed to lead to a series of tunnels under the pyramid; however, the Egyptian government has denied
C. are believed to lead to a series of tunnels under the pyramid; however, the Egyptian government was denied
D. are believed to lead to a series of tunnels under the pyramid; however, the Egyptian government had denied
E. is believed to lead to a series of tunnels under the pyramid; however, the Egyptian government had denied