To be Lean means: a. to be able to move quickly without significant penalty
b. to decrease economies of scale
c. to do the same things as Agile but modified just a bit
d. to reduce or eliminate waste from the system

d. to reduce or eliminate waste from the system

Explanation:

Lean refers in business to generating more benefits to your clients using less resources and a company using lean principles tries to eliminate all the unecessary things that doesn't add value which are considered waste and increase its efficiency. According to this, the answer is that to be lean means to reduce or eliminate waste from the system.

The other options are not right because Agile and Lean are different methodologies and Lean helps to generate cost reductions that can create economies of scale. Also, to be lean it doesn't matter if you move quickly or slow as long as you eliminate the waste to give more value to customers.

answer; (a) searching for information can be done quickly;