Given\[A=P(1+rt)\], what is the value of 'r' when\[A=27\],\[P=18\] and\[t=5\]?

• A.  \[\frac{11}{23}\]                                  
• B.  \[\frac{2}{9}\]
• C.  \[\frac{27}{7}\]                        
• D.  \[\frac{1}{10}\]