Which of the following do all species classified in the eukaryotic clade have in common?
OA.
Their cells all contain a membrane-bound nucleus.
OB.
Their cells all have a rigid cell wall.
OC.
They are all able to move around their environment.
OD.
They are all able to perform photosynthesis.

OA.

Their cells all contain a membrane-bound nucleus.

Explanation:

it can not be the option B because not all eukaryotic species have a cell wall, animals for example.

In option C plants are eukaryotic, but they are stuck on the ground and cannot move around the environment.

option D, fungi and animals are not able to do photosynthesis, they are heterotrophs.