Which sentence has no errors in the use of quotation marks, italics, or underlining?

a. my dad's all-time favorite poem is stopping by woods on a snowy evening by robert frost.
b. my dad's all-time favorite poem is stopping by woods on a snowy evening by robert frost.
c. my dad's all-time favorite poem is stopping by woods on a snowy evening by robert frost.
d. my dad's all-time favorite poem is "stopping by woods on a snowy evening" by robert frost.

glamis thou art, and cawdor; and shalt be what thou art promis'd; yet do i fear thy nature; it is too full o' the milk of human kindness to catch the nearest way: thou wouldst be great; art not without ambition; but without the illness should attend it. what thou wouldst highly, that wouldst thou holily; wouldst not play false, and yet wouldst wrongly win: thou'dst have, great glamis, that which cries, "thus thou must do, if thou have it: and that which rather thou dost fear to do than wishest should be undone." hie thee hither, that i may pour my spirits in thine ear; and chastise with the valor of my tongue all that impedes thee from the golden round, which fate and metaphysical aid doth seem to have thee crown'd withal.  

he lacks ambition.  

he is hesitant.  

he lacks courage.  

he has moral scruples.

what are the excerpts?

the answer would be, she updates her online profiles regularly and participates in work-related online discussions.

the answer is true.

the international phonetic alphabet (a standardized system of phonetic symbols devised and maintained by the international phonetic association) is composed of one or more elements of two basic types, letters and diacritics.