Nicolaus steno set down two geologic principles. what are they

Nicolaus Steno set down two geologic principles, they are:
1. Principle of original horizontality: it states that layers of sediments are originally deposited horizontally under the force of gravity.
2. Principle of lateral continuity: it states that layers of sediments initially extend laterally in all directions. 
These two principles are important in the analysis of folded and tilted strata.

The answer is option b.