When given an ATC clearance to hold east on the 090 radial, what may be the approach procedure?

The correct answer is based on the principles of holding patterns in aviation navigation. When given an Air Traffic Control (ATC) clearance to hold east on the 090 radial, the direct entry method is valid because it allows the pilot to approach the holding fix directly along the specified radial.

In this scenario, the holding pattern is oriented along the 090-degree radial, which means that if a pilot is approaching from the west, they can simply fly directly to the hold, making this the most straightforward entry method. A direct entry involves entering the holding pattern as soon as reaching the fix, aligning with the radial specified by ATC.

While there are other entry techniques, such as teardrop entries, those may not necessarily apply in this situation given the clear instruction to hold east. The other options might suggest alternate entry methods or conditions that are not necessary under the circumstances provided by the clearance, such as holding at a different VORTAC or using visual methods instead of following the set radio navigation.

In summary, the direct entry is the most logical and efficient approach when the ATC has specified the holding direction relative to the radial, making it the correct choice in this context.