Which sentence does not contain any errors in comma usage?

a.
jeremy, wandering alone, discovered turtles near the river.

b.
henry is the only person, paying attention to the dog.

c.
i adore that kitten, licking its fur.

d.
the kitten, lapping the cold milk, must be the hungriest.

Highlight all instances of parallel structure. there is no longer any room for hope. if we wish to be free—if we mean to preserve inviolate those inestimable privileges for which we have been so long contending—if we mean not basely to abandon the noble struggle in which we have been so long engaged, and which we have pledged ourselves never to abandon until the glorious object of our contest shall be obtained—we must fight!