system: You are an expert security code reviewer. You will be shown a source code file along with a multiple-choice question listing several function or class names from that file. Your task is to identify which one contains the specified CWE vulnerability.

OUTPUT FORMAT: Respond with the single letter of the correct option, wrapped in \boxed{...}. Example: `\boxed{B}`. Output the boxed letter ONLY -- no explanation, no other text.

user: ```python
#!/usr/bin/env python

import json
import requests
import logging
import watchtower
import os
from admanagerplusclient.connection import Connection

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
env_name = "prod" if "prod" in os.environ.get('SMP_SETUP_DIR') else "dev"
logger.addHandler(watchtower.CloudWatchLogHandler(log_group='brightroll_' + env_name, log_group_retention_days=30))

class Base:

    def __init__(self, connection):
        
        self.connection = connection

        self.dsp_host = "https://dspapi.admanagerplus.yahoo.com"
        self.report_url = 'https://api-sched-v3.admanagerplus.yahoo.com/yamplus_api/extreport/'

        self.headers = {
            'Content-Type': 'application/json',
            'X-Auth-Method': 'OAUTH',
            'X-Auth-Token': str(self.connection.token)
        }

    def generate_json_response(self, r, results_json, data=None):
        response_json = {
            'request_body': self.generate_curl_command(r.request.method, r.url, self.headers, data)
        }

        if 'errors' in results_json and results_json['errors'] is not None:
            response_json['msg_type'] = 'error'
            response_json['msg'] = results_json['errors']
            response_json['data'] = results_json['errors']
            response_json['response_code'] = results_json['errors']['httpStatusCode']

        elif 'validationMessages' in results_json:
            response_json['msg_type'] = 'error'
            response_json['msg'] = "Error"
            response_json['data'] = results_json
            response_json['response_code'] = r.status_code

        else:
            response_json['msg_type'] = 'success'
            # display the error message that comes back from request
            response_json['msg'] = 'Success'
            response_json['data'] = results_json
            response_json['response_code'] = r.status_code

        return response_json

    def make_request(self, url, headers, method_type, params=None, data=None):
        logger.info('requesting the url....url:{0}, params:{1}.'.format(url, params))
        if method_type == 'GET':
            r = requests.get(url, params=params, headers=self.headers)
        if method_type == 'POST':
            r = requests.post(url, headers=self.headers, verify=False, params=params, data=json.dumps(data))
        if method_type == 'PUT':
            r = requests.put(url, headers=self.headers, verify=False, params=params, json=data)

        results_json = r.json()

        if 'errors' in results_json and results_json['errors'] is not None:
            if results_json['errors']['httpStatusCode'] in [400, 401]:
                self.connection.token = self.refresh_access_token()['access_token']
                r = self.make_new_request(url, self.connection.token, method_type, headers, data)

        # use results_json to create updated json dict
        response_json = self.generate_json_response(r, results_json, data)
        logger.info('response from the url...url:{0}, params:{1}, res-code:{2}, res-data:{3}.'.format(url, params, str(r), response_json))
        return json.dumps(response_json)

    def traffic_types(self, s_type, seat_id=None):
        url = self.dsp_host + "/traffic/" + str(s_type)
        if seat_id is not None:
            url += "/?seatId=" + str(seat_id)

        r = self.make_request(url, self.headers, 'GET')
        return r

    # Works for s_types:
    # advertisers, campaigns, lines
    def traffic_type_by_id(self, s_type, cid, seat_id):
        url = self.dsp_host + "/traffic/" + str(s_type)
        url = url + "/" + str(cid) + "/?seatId=" + str(seat_id)

        r = self.make_request(url, self.headers, 'GET')
        return r

    def generate_curl_command(self, method, url, headers, data=None):
        command = 'curl -v -H {headers} {data} -X {method} "{uri}"'
        
        header_list = ['"{0}: {1}"'.format(k, v) for k, v in headers.items()]
        header = " -H ".join(header_list)

        return command.format(method=method, headers=header, data=data, uri=url)

```

Which of the following functions or classes contains a `CWE-295: Improper Certificate Validation` vulnerability?

  A) traffic_type_by_id
  B) make_request
  C) Base
  D) generate_curl_command
Answer: B