Explanation:

- The sentence seems to describe a relationship or interaction between objectives or parties. Understanding this relationship is key to filling in the blank.

- Opposing: This would imply conflict or contradiction between each other. The objectives of a movement might sometimes be opposing, but this often isn't a productive stance.

- Effecting: This suggests causing something to happen. However, 'effecting each other' is not a common or natural expression in this context.

- Familiarising: This means becoming more familiar with something. It doesn’t usually apply directly to objectives affecting each other.

- Influencing: This suggests that the objectives have an impact on one another. It is a logical description of how objectives can shape or change each other over time.