Campaigning for election to provincial or state office frequently requires that a candidate spend much time and energy catering to the interests of national party officials who can help the candidate to win office. The elected officials who campaign for reelection while they are in office thus often fail to serve the interests of their local constituencies.

Which one of the following is an assumption made by the argument?

• ACatering to the interests of national party officials sometimes conflicts with serving the interests of a provincial or state official's local constituencies  
• BOnly by catering to the interests of national party officials can those who hold provincial or state office win reelection  
• CThe interests of local constituencies are well served only by elected officials who do not cater to the interests of national party officials  
• DOfficials elected to provincial or state office are obligated to serve only the interests of constituents who belong to the same party as do the officials  
• EAll elected officials are likely to seek reelection to those offices that are not limited to one term