A student wants to do a research paper on Walt Whitman's literary influences. Which of these would offer the MOST relevant information?
A)
a copy of Leaves of Grass
B)
a criticism of "On the Beach at Night"
0)
a comparison of "I Heard the Learn'd Astronomer" and "Song of Myself"
D)
a collection of Whitman's personal letters to his friends and colleagues
Correct answer is D

the red coloration of the lungs looks alarming and adds to the overall message that the flu is threatening apex

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).