Which style do you prefer for your React Class?

sample.js

// Sample A. Inline export with implicit import
import React from 'react';
export default class SampleA extends React.Component {
}

// Sample B. Inline export with explicit import
import React, { Component } from 'react';
export default class SampleB extends Component {
}

// Sample C. EOF export with implicit import
import React from 'react';
class SampleC extends React.Component {
}
export default SampleC

// Sample D. EOF export with explicit import
import React, { Component } from 'react';
class SampleD extends Component {
}
export default SampleD