1. to plan, organize, or carry out.

2. a raised platform or floor, as for speakers, performers, etc.
3. a single step or degree in a process; a particular phase, period, position, etc., in a process, development, or series.
4. the small platform of a microscope on which the object to be examined is placed.
5. a dramatic fit thrown in a moment of rage

Which definition is the BEST meaning for the word stage as it is used in this sentence?

He determined that since Julianne’s cancer had been discovered in an early stage of development, perhaps her fertility could also be saved.
1. Definition 1
2. Definition 2
3. Definition 2
4. Definition 4

3. Definition 3