A) 0.3
B)0.45
C)0.9
D)0.25

A: Set is linearly independent and spans ℛ 3. Set is a basis for ℛ 3. 

Step-by-step explanation:

A subset S of a vector space V is called a basis 

if S is linearly independent, and S is a spanning set.

Any three linearly independent vectors form a basis of  R3

Therefore in a given set of vectors R3, Set is linearly independent and spans ℛ 3. Set is also a basis for ℛ 3.