To solve this question, the user needs to have knowledge of Datastage 8.5 and the concept of nodes in Datastage.
In Datastage 8.5, the maximum number of nodes that can be configured depends on the edition of Datastage. The user needs to know that the correct answer will be the maximum number of nodes that can be configured in Datastage 8.5.
Now, let's go through each option and explain why it is right or wrong:
A. 10: This option is incorrect because Datastage 8.5 does not support a maximum of 10 nodes. The maximum number of nodes that can be configured in Datastage 8.5 is less than 10.
B. 6: This option is incorrect because Datastage 8.5 does not support a maximum of 6 nodes. The maximum number of nodes that can be configured in Datastage 8.5 is less than 6.
C. 8: This option is correct. In Datastage 8.5, the maximum number of nodes that can be configured is 8. This means that a Datastage 8.5 environment can have a maximum of 8 nodes.
D. infinity: This option is incorrect because Datastage 8.5 does not support an infinite number of nodes. There is a maximum limit to the number of nodes that can be configured in Datastage 8.5.
The Answer is: C. 8